The Hall-effect sensor has been adopted in a number of micromechanical applications including closed-loop autofocus and auto-iris for smartphone cameras.
The company has itself been mass producing Hall switches and electrical compasses using the planar-type Hall-effect sensor since 2014. The initial products were characterized by Hall resistance of 2.4kohms, sensitivity of 44.5mV/VT and a corner frequency of 500Hz.
The rapid adoption of these and subsequent products has prompted MagnaChip to provide the planar-type Hall-effect sensors to foundry customers.
MagnaChip's Hall-effect sensor can be integrated into a customer's design by adding a single mask to various processes that the foundry already offers. In addition, the integration of the Hall-effect sensors can be made without making any changes in electrical characteristics and it is offered regardless of the technology node, ranging from 130nm to 0.35-micron. The process design kit (PDK) provides P-cell and Verilog-A models, with availability to a temperature of up to 150 degree C to enable use in applications, such as IoT and automotive markets.
In addition, MagnaChip is developing a vertical Hall-effect sensor with the direction of the magnetic field being parallel to the silicon surface, which enables three-dimensional Hall sensing capabilities. Vertical Hall-effect sensors can also be used applications, including proximity switching, positioning, speed detection and current sensing applications. MagnaChip anticipates that it will develop a variety of Hall-effect sensors to meet the growing needs of its global foundry customers.
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